a11y: add skip-to-content link

[propcgamer20-png]

Adds a visually-hidden-until-focused 'Skip to content' link as the first focusable element in the body, jumping to a new id="main-content" on

. Follows the same sr-only/focus:not-sr-only Tailwind pattern already used elsewhere in the codebase (dialog.tsx, sheet.tsx close buttons).

Fixes #261

What this changes

Type of change

• New public place(s)
• New or updated benefit guide
• New or updated resource link
• Code or fix
• Docs

Proof (required for new public places)

Fill this in for every place added in this PR. It stays in the PR, not in the
dataset.

Field	Value
Source or citation
Google Maps rating (must be >= 4.0)
Google Maps review count (must be >= 50)
Date verified

• Each place's rating is 4.0 or higher.
• Each place has 50 or more reviews.
• Coordinates point to the correct entrance.
• The JSON record stops at gmaps_link and added_by (no proof fields committed).

Checklist

• The site hosts no copyrighted files; resource and paper changes are links only.
• No em dashes in any copy.

[vercel]

@propcgamer20-png is attempting to deploy a commit to the studentsuite Team on Vercel.

A member of the Team first needs to authorize it.